Amid growing efforts to find more sustainable methods of transportation, Israeli design student Dror Peleg has come up with a concept bicycle, called ‘Frii,’ that uses recycled plastics and injection mold technology. In comparison to the conventional metal bicycle, mass production of Frii can be adapted to whatever resources are available locally. The tires also use the injection mold technology and are completely solid (no air required), making them ‘flat tire’-proof.